20186541680

素因数分解:

$2^4\times 5^1\times {\mathrm{1999}}^1\times {\mathrm{126229}}^1$

素因数の和:128241

約数の個数: 40

約数和(自身を含む): 46957560000

約数和(自身を除く): 26771018320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1999, 3998, 7996, 9995, 15992, 19990, 31984, 39980, 79960, 126229, 159920, 252458, 504916, 631145, 1009832, 1262290, 2019664, 2524580, 5049160, 10098320, 252331771, 504663542, 1009327084, 1261658855, 2018654168, 2523317710, 4037308336, 5046635420, 10093270840, 20186541680]

約数ペア:

[(1, 20186541680), (2, 10093270840), (4, 5046635420), (5, 4037308336), (8, 2523317710), (10, 2018654168), (16, 1261658855), (20, 1009327084), (40, 504663542), (80, 252331771), (1999, 10098320), (3998, 5049160), (7996, 2524580), (9995, 2019664), (15992, 1262290), (19990, 1009832), (31984, 631145), (39980, 504916), (79960, 252458), (126229, 159920)]